#include<stdio.h>
int main()
{

	while(1)
	{
		char c=getchar();
		if(c>='a'&&c<='z') 
		{
		    c=(c+2-'a')%26+'a';
            putchar(c);
        }
        else if(c='\n')
            break;
	}
	return 0;
}

